<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <style>
    div{color: red}
    p{color: blue !important;}
    #p1{color: yellow}
  </style>
</head>
<body>
  <div>这是div
    <p id="p1">这是p标签</p>
    <span>这是span</span>
    <a href="">超链接</a>
  </div>
</body>
</html>